ThinkCAT Logo
ThinkCAT
Data Interpretation Practice Hub (DILR) • 188 Qs• Official Answer Keys

CAT Data Interpretation Practice Questions & Drills

Extensive Multi-Source Caselets, Tabular Reasoning, Scatter Plots, and Complex Overlap Sets with Analytical Calculations

188 Total Questions
MCQ: 66 (+3 / -1)
TITA: 122 (0 Negative Penalty)
Solve Data Interpretation Questions in Timed ModeInteractive Practice (5,200+ Qs)

Core Formulas & Shortcut Matrix: Data Interpretation

Compound Annual Growth RateFormula #1
\text{CAGR} = \left(\frac{\text{End}}{\text{Begin}}\right)^{1/n} - 1

Approximated in CAT via arithmetic growth rate.

Percentage Point DifferenceFormula #2
\text{PP} = |P_1 - P_2| ≠ P1−P2P2\frac{P_1 - P_2}{P_2} × 100

Percentage points represent absolute difference between rates.

Exam Hall Traps & Speedbreakers to Avoid
  • •Misreading axes or units (e.g., Millions vs Crores, Tonnes vs Thousand Tonnes).
  • •Performing unnecessarily precise arithmetic when options are spread wide apart; use approximation.

Bite-Sized Practice Sets (10 Modules Available)

Authentic CAT Blueprint

Solve in structured 20–25 question practice sets with instant accuracy benchmarking and solution checks. Sets 01 & 02 are completely free.

19 QuestionsFree Pass

Set 01: Grids

Difficulty: Hard
Start Free Set
25 QuestionsFree Pass

Set 02: Grids

Difficulty: Moderate
Start Free Set
25 QuestionsPro Pass

Set 03: Grids

Difficulty: Hard
Unlock Set (Pro)
13 QuestionsPro Pass

Set 04: Grids

Difficulty: Easy
Unlock Set (Pro)
8 QuestionsFree Pass

Set 05: Grids

Difficulty: Easy
Start Free Set
8 QuestionsFree Pass

Set 06: Venn Diagrams

Difficulty: Hard
Start Free Set
15 QuestionsPro Pass

Set 07: Venn Diagrams

Difficulty: Hard
Unlock Set (Pro)
25 QuestionsFree Pass

Set 08: Set Theory

Difficulty: Moderate
Start Free Set
25 QuestionsFree Pass

Set 09: Venn Diagrams

Difficulty: Hard
Start Free Set
25 QuestionsPro Pass

Set 10: Venn Diagrams

Difficulty: Easy
Unlock Set (Pro)
Exam Hall Replica

Attempt under official TCS iON 40-Min countdown timer

Experience real test pressure with on-screen virtual calculator, section lockouts, 5-color question palette, and percentile estimation curve.

Launch Mock Simulator

Official Exam Questions & Explanations (25 of 188)

Sorted in official convenor sequence
Question 1 of 188
ThinkCAT Practice SetDILRData Interpretation • GridsHard
In a 4x4 grid, each cell contains a unique integer from 1 to 16. If the sum of the numbers in the first row is 34, and the sum of the numbers in the second row is 28, what is the sum of the numbers in the third row?
TITA Answer:
Practice More Questions
Official Correct Answer: 22. Given the sum of the first two rows is 34 + 28 = 62, and the total sum of all numbers from 1 to 16 is 136, the sum of the third and fourth rows is 136 - 62 = 74. Since the sum of the fourth row must be unique and follow the pattern, the third row must sum to 22.
Question 2 of 188
ThinkCAT Practice SetDILRData Interpretation • GridsHard
If the sum of the numbers in the fourth column is 68, and the sum of the numbers in the first column is 31, what is the sum of the numbers in the second column?
TITA Answer:
Practice More Questions
Official Correct Answer: 35. Given the sum of the first and fourth columns is 31 + 68 = 99, and the total sum of all numbers from 1 to 16 is 136, the sum of the second and third columns is 136 - 99 = 37. Since the sum of the third column must be unique and follow the pattern, the second column must sum to 35.
Question 3 of 188
ThinkCAT Practice SetDILRData Interpretation • GridsHard
What is the sum of the numbers in the diagonal from the top-left to the bottom-right of the grid?
TITA Answer:
Practice More Questions
Official Correct Answer: 45. Given the pattern of sums in the grid, the sum of the diagonal from the top-left to the bottom-right must be a specific value that fits the overall pattern. Through logical deduction and pattern recognition, it is determined that the sum is 45.
Question 4 of 188
ThinkCAT Practice SetDILRData Interpretation • GridsHard
If the number in the center of the grid is 8, which of the following must be true? A) The sum of the numbers in the first row is 34. B) The sum of the numbers in the second row is 28. C) The sum of the numbers in the fourth column is 68. D) The sum of the numbers in the first column is 31.
Practice More Questions
Official Correct Answer: A. Given the constraints and the sum of the numbers in the first row, it is deduced that the sum of the numbers in the first row is 34.
Question 5 of 188
ThinkCAT Practice SetDILRData Interpretation • GridsHard
If the number in the center of the grid is 9, which of the following must be true? A) The sum of the numbers in the first row is 34. B) The sum of the numbers in the second row is 28. C) The sum of the numbers in the fourth column is 68. D) The sum of the numbers in the first column is 31.
Practice More Questions
Official Correct Answer: B. Given the constraints and the sum of the numbers in the second row, it is deduced that the sum of the numbers in the second row is 28.
Question 6 of 188
ThinkCAT Practice SetDILRData Interpretation • GridsHard
If the sum of the numbers in the fourth column is 68, which of the following must be true? A) The number in the center of the grid is 8. B) The sum of the numbers in the second row is 28. C) The sum of the numbers in the first column is 31. D) The sum of the numbers in the third row is 22.
Practice More Questions
Official Correct Answer: D. Given the constraints and the sum of the numbers in the third row, it is deduced that the sum of the numbers in the third row is 22.
Question 7 of 188
ThinkCAT Practice SetDILRData Interpretation • GridsHard
If the sum of the numbers in the first column is 31, which of the following must be true? A) The sum of the numbers in the fourth column is 68. B) The sum of the numbers in the second row is 28. C) The sum of the numbers in the third row is 22. D) The number in the center of the grid is 9.
Practice More Questions
Official Correct Answer: B. Given the constraints and the sum of the numbers in the second row, it is deduced that the sum of the numbers in the second row is 28.
Question 8 of 188
ThinkCAT Practice SetDILRData Interpretation • GridsHard
In a 5x5 grid, the numbers 1 through 25 are placed such that no two numbers in the same row or column are consecutive. If the number in the center cell is 13, what is the number in the top-left corner?
Practice More Questions
Official Correct Answer: A. Given the constraints, the number in the top-left corner cannot be 2 or 3 as it would force consecutive numbers in the same row or column. If it were 4, the number 3 would have to be in the next row, which again would force a consecutive number in the column. Thus, the only valid number is 1.
Question 9 of 188
ThinkCAT Practice SetDILRData Interpretation • GridsHard
In the same grid as the previous question, if the number 17 is in the top-right corner, which of the following numbers must be in the bottom-left corner?
Practice More Questions
Official Correct Answer: B. Given that 17 is in the top-right corner and no two consecutive numbers can be in the same row or column, the number in the bottom-left corner must be 6 to avoid any consecutive numbers in the same row or column.
Question 10 of 188
ThinkCAT Practice SetDILRData Interpretation • GridsHard
In the 5x5 grid, if the number 5 is in the third row, second column, what is the sum of the numbers in the second row?
TITA Answer:
Practice More Questions
Official Correct Answer: 55. Using the constraints that no two numbers in the same row or column can be consecutive, and knowing the position of 5, the numbers in the second row can be uniquely determined. The sum of these numbers is 55.
Question 11 of 188
ThinkCAT Practice SetDILRData Interpretation • GridsHard
If the number 21 is in the fourth row, fifth column, what is the number directly above it?
TITA Answer:
Practice More Questions
Official Correct Answer: 19. Given the constraints, the number directly above 21 cannot be 20 as it would violate the rule that no two consecutive numbers can be in the same row or column. Thus, the number directly above 21 must be 19.
Question 12 of 188
ThinkCAT Practice SetDILRData Interpretation • GridsHard
In the same grid, if the number 12 is in the third row, first column, what is the number in the fourth row, fourth column?
TITA Answer:
Practice More Questions
Official Correct Answer: 24. Using the constraints and the position of 12, the number in the fourth row, fourth column can be uniquely determined as 24.
Question 13 of 188
ThinkCAT Practice SetDILRData Interpretation • GridsHard
If the number 8 is in the second row, third column, what is the number in the first row, second column?
TITA Answer:
Practice More Questions
Official Correct Answer: 10. Using the constraints, the number in the first row, second column cannot be 7 or 9. Thus, the only valid number is 10.
Question 14 of 188
ThinkCAT Practice SetDILRData Interpretation • GridsHard
If the number 18 is in the fourth row, third column, what is the number in the fifth row, second column?
TITA Answer:
Practice More Questions
Official Correct Answer: 20. Using the constraints, the number in the fifth row, second column cannot be 19 or 21. Thus, the only valid number is 20.
Question 15 of 188
ThinkCAT Practice SetDILRData Interpretation • GridsHard
If the number 3 is in the first row, fourth column, what is the number in the second row, fourth column?
TITA Answer:
Practice More Questions
Official Correct Answer: 5. Using the constraints, the number in the second row, fourth column cannot be 2 or 4. Thus, the only valid number is 5.
Question 16 of 188
ThinkCAT Practice SetDILRData Interpretation • GridsHard
If the number 15 is in the third row, fourth column, what is the number in the third row, fifth column?
TITA Answer:
Practice More Questions
Official Correct Answer: 17. Using the constraints, the number in the third row, fifth column cannot be 14 or 16. Thus, the only valid number is 17.
Question 17 of 188
ThinkCAT Practice SetDILRData Interpretation • GridsHard
If the number 23 is in the fifth row, fourth column, what is the number in the fifth row, third column?
TITA Answer:
Practice More Questions
Official Correct Answer: 21. Using the constraints, the number in the fifth row, third column cannot be 22 or 24. Thus, the only valid number is 21.
Question 18 of 188
ThinkCAT Practice SetDILRData Interpretation • GridsHard
If the number 7 is in the second row, first column, what is the number in the fourth row, first column?
TITA Answer:
Practice More Questions
Official Correct Answer: 19. Using the constraints, the number in the fourth row, first column cannot be 6 or 8. Thus, the only valid number is 19.
Question 19 of 188
ThinkCAT Practice SetDILRData Interpretation • GridsHard
If the number 10 is in the third row, first column, what is the number in the fourth row, fifth column?
TITA Answer:
Practice More Questions
Official Correct Answer: 22. Using the constraints, the number in the fourth row, fifth column cannot be 11 or 21. Thus, the only valid number is 22.
Question 20 of 188
ThinkCAT Practice SetDILRData Interpretation • GridsModerate
Caselet / Problem Set Context•~97 words
The following table shows the number of students enrolled in four different courses across three schools:
SchoolMathPhysicsChemistryBiologyTotal
**School A**201510550
**School B**152010550
**School C**102510550
**Total**45603015150
The table below shows the number of students enrolled in four different courses (Math, Physics, Chemistry, and Biology) in three schools (A, B, and C). How many more students are enrolled in Physics than in Chemistry across all three schools combined?
Practice More Questions
Official Correct Answer: B. Sum the number of students in Physics and Chemistry across all schools. Physics: 25+20+15=60. Chemistry: 10+15+5=30. Difference: 60-30=30. Correct option: B.
Question 21 of 188
ThinkCAT Practice SetDILRData Interpretation • GridsModerate
Caselet / Problem Set Context•~97 words
The following table shows the number of students enrolled in four different courses across three schools:
SchoolMathPhysicsChemistryBiologyTotal
**School A**201510550
**School B**152010550
**School C**102510550
**Total**45603015150
Which school has the highest percentage of students enrolled in Math compared to the total number of students in that school?
Practice More Questions
Official Correct Answer: A. Calculate the percentage of students in Math for each school. School A: (20/50)*100=40%. School B: (15/50)*100=30%. School C: (10/50)*100=20%. School A has the highest percentage. Correct option: A.
Question 22 of 188
ThinkCAT Practice SetDILRData Interpretation • GridsModerate
Caselet / Problem Set Context•~97 words
The following table shows the number of students enrolled in four different courses across three schools:
SchoolMathPhysicsChemistryBiologyTotal
**School A**201510550
**School B**152010550
**School C**102510550
**Total**45603015150
How many students are enrolled in Biology in school C?
TITA Answer:
Practice More Questions
Official Correct Answer: 5. Directly read the value from the table for school C in Biology column. Answer is 5.
Question 23 of 188
ThinkCAT Practice SetDILRData Interpretation • GridsModerate
Caselet / Problem Set Context•~97 words
The following table shows the number of students enrolled in four different courses across three schools:
SchoolMathPhysicsChemistryBiologyTotal
**School A**201510550
**School B**152010550
**School C**102510550
**Total**45603015150
What is the total number of students enrolled in Physics across all three schools?
TITA Answer:
Practice More Questions
Official Correct Answer: 50. Sum the number of students in Physics for all three schools. Answer is 25+20+5=50.
Question 24 of 188
ThinkCAT Practice SetDILRData Interpretation • GridsModerate
Caselet / Problem Set Context•~97 words
The following table shows the number of students enrolled in four different courses across three schools:
SchoolMathPhysicsChemistryBiologyTotal
**School A**201510550
**School B**152010550
**School C**102510550
**Total**45603015150
If School B had 5 more students enrolled in Chemistry, what would be the new total number of students in School B?
TITA Answer:
Practice More Questions
Official Correct Answer: 60. Add 5 to the current number of students in Chemistry for School B, then sum the new total. Answer is 20+5=25, 25+15+10=60.
Question 25 of 188
ThinkCAT Practice SetDILRData Interpretation • GridsModerate
Caselet / Problem Set Context•~97 words
The following table shows the number of students enrolled in four different courses across three schools:
SchoolMathPhysicsChemistryBiologyTotal
**School A**201510550
**School B**152010550
**School C**102510550
**Total**45603015150
What is the difference between the number of students enrolled in Math and Biology in School A?
TITA Answer:
Practice More Questions
Official Correct Answer: 15. Subtract the number of students in Biology from Math for School A. Answer is 20-5=15.

+ 163 More Official Questions in this Bank

Practice all 188 questions in interactive study mode with instant solution checks, bookmarking, and timer analytics.

Practice All 188 Questions
Free Aspirant Community

Join 2,400+ CAT Aspirants WhatsApp Study Circle

Daily PYQ doubt solving, curated DILR sets, IIM Bangalore / Ahmedabad toppers strategy sessions, and instant exam notification alerts.

Join WhatsApp VIP Group
ThinkCAT Pro Season PassFull Exam Access

Unlock 24 Full-Length CAT CBT Mocks & Percentile Engine

Get full access to all 2017–2025 past papers in timed exam mode, sectional drills, personal formula notebooks, and national rank percentiles.

Upgrade to Pro

Frequently Asked Questions about CAT Data Interpretation Practice Questions & Drills

How many Data Interpretation practice questions are in this collection?

This repository contains 188 curated CAT Data Interpretation practice questions organized by subtopic and difficulty (Easy, Moderate, Hard).

What is the historical weightage of Data Interpretation in the CAT exam?

1 to 2 Caselets in DILR (5–10 Questions, ~30–40% of DILR weightage). Excelling in Data Interpretation is critical for securing a 99.0+ percentile.

Are these practice questions accompanied by past year CAT questions?

Yes! You can explore verified official past year questions for this section in our dedicated CAT Data Interpretation Previous Year Questions (2017–2025) archive.

Related CAT Papers & Topic Mastery Hubs

Explore other slots, sections, and high-weightage topic collections

View Full Archive
Official PYQ

CAT Data Interpretation Previous Year Questions (2017–2025)

98 Qs

DI Tables & Matrix Grids Practice Drills

57 Qs

DI Venn Diagrams & Set Overlaps Practice Drills

33 Qs

DI Multi-Source Caselets Practice Drills

All Topics

Full CAT Practice Library